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KVM: Portability: Move x86 vcpu ioctl handlers to x86.c 

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Hollis Blanchard 2007-11-01 14:16:10 -05:00 committed by Avi Kivity
parent d075206073
commit b6c7a5dccf
3 changed files with 443 additions and 436 deletions
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10
drivers/kvm/kvm.h
View File

@ -636,6 +636,16 @@ void kvm_arch_destroy_vm(struct kvm *kvm);
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs);
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs);
int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
struct kvm_debug_guest *dbg);
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
__init void kvm_arch_init(void);
static inline void kvm_guest_enter(void)

442
drivers/kvm/kvm_main.c
View File

@ -778,422 +778,6 @@ void kvm_resched(struct kvm_vcpu *vcpu)
}
EXPORT_SYMBOL_GPL(kvm_resched);
/*
* Check if userspace requested an interrupt window, and that the
* interrupt window is open.
*
* No need to exit to userspace if we already have an interrupt queued.
*/
static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
return (!vcpu->irq_summary &&
kvm_run->request_interrupt_window &&
vcpu->interrupt_window_open &&
(kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
}
static void post_kvm_run_save(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
kvm_run->cr8 = get_cr8(vcpu);
kvm_run->apic_base = kvm_get_apic_base(vcpu);
if (irqchip_in_kernel(vcpu->kvm))
kvm_run->ready_for_interrupt_injection = 1;
else
kvm_run->ready_for_interrupt_injection =
(vcpu->interrupt_window_open &&
vcpu->irq_summary == 0);
}
static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
int r;
if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
pr_debug("vcpu %d received sipi with vector # %x\n",
vcpu->vcpu_id, vcpu->sipi_vector);
kvm_lapic_reset(vcpu);
r = kvm_x86_ops->vcpu_reset(vcpu);
if (r)
return r;
vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
}
preempted:
if (vcpu->guest_debug.enabled)
kvm_x86_ops->guest_debug_pre(vcpu);
again:
r = kvm_mmu_reload(vcpu);
if (unlikely(r))
goto out;
kvm_inject_pending_timer_irqs(vcpu);
preempt_disable();
kvm_x86_ops->prepare_guest_switch(vcpu);
kvm_load_guest_fpu(vcpu);
local_irq_disable();
if (signal_pending(current)) {
local_irq_enable();
preempt_enable();
r = -EINTR;
kvm_run->exit_reason = KVM_EXIT_INTR;
++vcpu->stat.signal_exits;
goto out;
}
if (irqchip_in_kernel(vcpu->kvm))
kvm_x86_ops->inject_pending_irq(vcpu);
else if (!vcpu->mmio_read_completed)
kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
vcpu->guest_mode = 1;
kvm_guest_enter();
if (vcpu->requests)
if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
kvm_x86_ops->tlb_flush(vcpu);
kvm_x86_ops->run(vcpu, kvm_run);
vcpu->guest_mode = 0;
local_irq_enable();
++vcpu->stat.exits;
/*
* We must have an instruction between local_irq_enable() and
* kvm_guest_exit(), so the timer interrupt isn't delayed by
* the interrupt shadow. The stat.exits increment will do nicely.
* But we need to prevent reordering, hence this barrier():
*/
barrier();
kvm_guest_exit();
preempt_enable();
/*
* Profile KVM exit RIPs:
*/
if (unlikely(prof_on == KVM_PROFILING)) {
kvm_x86_ops->cache_regs(vcpu);
profile_hit(KVM_PROFILING, (void *)vcpu->rip);
}
r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
if (r > 0) {
if (dm_request_for_irq_injection(vcpu, kvm_run)) {
r = -EINTR;
kvm_run->exit_reason = KVM_EXIT_INTR;
++vcpu->stat.request_irq_exits;
goto out;
}
if (!need_resched()) {
++vcpu->stat.light_exits;
goto again;
}
}
out:
if (r > 0) {
kvm_resched(vcpu);
goto preempted;
}
post_kvm_run_save(vcpu, kvm_run);
return r;
}
static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
int r;
sigset_t sigsaved;
vcpu_load(vcpu);
if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
kvm_vcpu_block(vcpu);
vcpu_put(vcpu);
return -EAGAIN;
}
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
/* re-sync apic's tpr */
if (!irqchip_in_kernel(vcpu->kvm))
set_cr8(vcpu, kvm_run->cr8);
if (vcpu->pio.cur_count) {
r = complete_pio(vcpu);
if (r)
goto out;
}
#if CONFIG_HAS_IOMEM
if (vcpu->mmio_needed) {
memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
vcpu->mmio_read_completed = 1;
vcpu->mmio_needed = 0;
r = emulate_instruction(vcpu, kvm_run,
vcpu->mmio_fault_cr2, 0, 1);
if (r == EMULATE_DO_MMIO) {
/*
* Read-modify-write. Back to userspace.
*/
r = 0;
goto out;
}
}
#endif
if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
kvm_x86_ops->cache_regs(vcpu);
vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
kvm_x86_ops->decache_regs(vcpu);
}
r = __vcpu_run(vcpu, kvm_run);
out:
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
vcpu_put(vcpu);
return r;
}
static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
struct kvm_regs *regs)
{
vcpu_load(vcpu);
kvm_x86_ops->cache_regs(vcpu);
regs->rax = vcpu->regs[VCPU_REGS_RAX];
regs->rbx = vcpu->regs[VCPU_REGS_RBX];
regs->rcx = vcpu->regs[VCPU_REGS_RCX];
regs->rdx = vcpu->regs[VCPU_REGS_RDX];
regs->rsi = vcpu->regs[VCPU_REGS_RSI];
regs->rdi = vcpu->regs[VCPU_REGS_RDI];
regs->rsp = vcpu->regs[VCPU_REGS_RSP];
regs->rbp = vcpu->regs[VCPU_REGS_RBP];
#ifdef CONFIG_X86_64
regs->r8 = vcpu->regs[VCPU_REGS_R8];
regs->r9 = vcpu->regs[VCPU_REGS_R9];
regs->r10 = vcpu->regs[VCPU_REGS_R10];
regs->r11 = vcpu->regs[VCPU_REGS_R11];
regs->r12 = vcpu->regs[VCPU_REGS_R12];
regs->r13 = vcpu->regs[VCPU_REGS_R13];
regs->r14 = vcpu->regs[VCPU_REGS_R14];
regs->r15 = vcpu->regs[VCPU_REGS_R15];
#endif
regs->rip = vcpu->rip;
regs->rflags = kvm_x86_ops->get_rflags(vcpu);
/*
* Don't leak debug flags in case they were set for guest debugging
*/
if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
vcpu_put(vcpu);
return 0;
}
static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
struct kvm_regs *regs)
{
vcpu_load(vcpu);
vcpu->regs[VCPU_REGS_RAX] = regs->rax;
vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
#ifdef CONFIG_X86_64
vcpu->regs[VCPU_REGS_R8] = regs->r8;
vcpu->regs[VCPU_REGS_R9] = regs->r9;
vcpu->regs[VCPU_REGS_R10] = regs->r10;
vcpu->regs[VCPU_REGS_R11] = regs->r11;
vcpu->regs[VCPU_REGS_R12] = regs->r12;
vcpu->regs[VCPU_REGS_R13] = regs->r13;
vcpu->regs[VCPU_REGS_R14] = regs->r14;
vcpu->regs[VCPU_REGS_R15] = regs->r15;
#endif
vcpu->rip = regs->rip;
kvm_x86_ops->set_rflags(vcpu, regs->rflags);
kvm_x86_ops->decache_regs(vcpu);
vcpu_put(vcpu);
return 0;
}
static void get_segment(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg)
{
return kvm_x86_ops->get_segment(vcpu, var, seg);
}
static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
struct descriptor_table dt;
int pending_vec;
vcpu_load(vcpu);
get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
kvm_x86_ops->get_idt(vcpu, &dt);
sregs->idt.limit = dt.limit;
sregs->idt.base = dt.base;
kvm_x86_ops->get_gdt(vcpu, &dt);
sregs->gdt.limit = dt.limit;
sregs->gdt.base = dt.base;
kvm_x86_ops->decache_cr4_guest_bits(vcpu);
sregs->cr0 = vcpu->cr0;
sregs->cr2 = vcpu->cr2;
sregs->cr3 = vcpu->cr3;
sregs->cr4 = vcpu->cr4;
sregs->cr8 = get_cr8(vcpu);
sregs->efer = vcpu->shadow_efer;
sregs->apic_base = kvm_get_apic_base(vcpu);
if (irqchip_in_kernel(vcpu->kvm)) {
memset(sregs->interrupt_bitmap, 0,
sizeof sregs->interrupt_bitmap);
pending_vec = kvm_x86_ops->get_irq(vcpu);
if (pending_vec >= 0)
set_bit(pending_vec,
(unsigned long *)sregs->interrupt_bitmap);
} else
memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
sizeof sregs->interrupt_bitmap);
vcpu_put(vcpu);
return 0;
}
static void set_segment(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg)
{
return kvm_x86_ops->set_segment(vcpu, var, seg);
}
static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
int mmu_reset_needed = 0;
int i, pending_vec, max_bits;
struct descriptor_table dt;
vcpu_load(vcpu);
dt.limit = sregs->idt.limit;
dt.base = sregs->idt.base;
kvm_x86_ops->set_idt(vcpu, &dt);
dt.limit = sregs->gdt.limit;
dt.base = sregs->gdt.base;
kvm_x86_ops->set_gdt(vcpu, &dt);
vcpu->cr2 = sregs->cr2;
mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
vcpu->cr3 = sregs->cr3;
set_cr8(vcpu, sregs->cr8);
mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
#ifdef CONFIG_X86_64
kvm_x86_ops->set_efer(vcpu, sregs->efer);
#endif
kvm_set_apic_base(vcpu, sregs->apic_base);
kvm_x86_ops->decache_cr4_guest_bits(vcpu);
mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
vcpu->cr0 = sregs->cr0;
kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
if (!is_long_mode(vcpu) && is_pae(vcpu))
load_pdptrs(vcpu, vcpu->cr3);
if (mmu_reset_needed)
kvm_mmu_reset_context(vcpu);
if (!irqchip_in_kernel(vcpu->kvm)) {
memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
sizeof vcpu->irq_pending);
vcpu->irq_summary = 0;
for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
if (vcpu->irq_pending[i])
__set_bit(i, &vcpu->irq_summary);
} else {
max_bits = (sizeof sregs->interrupt_bitmap) << 3;
pending_vec = find_first_bit(
(const unsigned long *)sregs->interrupt_bitmap,
max_bits);
/* Only pending external irq is handled here */
if (pending_vec < max_bits) {
kvm_x86_ops->set_irq(vcpu, pending_vec);
pr_debug("Set back pending irq %d\n",
pending_vec);
}
}
set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
vcpu_put(vcpu);
return 0;
}
void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
{
struct kvm_segment cs;
get_segment(vcpu, &cs, VCPU_SREG_CS);
*db = cs.db;
*l = cs.l;
}
EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
/*
* Translate a guest virtual address to a guest physical address.
*/
@ -1233,20 +817,6 @@ static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
return 0;
}
static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
struct kvm_debug_guest *dbg)
{
int r;
vcpu_load(vcpu);
r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
vcpu_put(vcpu);
return r;
}
static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
unsigned long address,
int *type)
@ -1392,13 +962,13 @@ static long kvm_vcpu_ioctl(struct file *filp,
r = -EINVAL;
if (arg)
goto out;
r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
break;
case KVM_GET_REGS: {
struct kvm_regs kvm_regs;
memset(&kvm_regs, 0, sizeof kvm_regs);
r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
r = kvm_arch_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
if (r)
goto out;
r = -EFAULT;
@ -1413,7 +983,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
goto out;
r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
r = kvm_arch_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
if (r)
goto out;
r = 0;
@ -1423,7 +993,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
struct kvm_sregs kvm_sregs;
memset(&kvm_sregs, 0, sizeof kvm_sregs);
r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
if (r)
goto out;
r = -EFAULT;
@ -1438,7 +1008,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
goto out;
r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
if (r)
goto out;
r = 0;
@ -1477,7 +1047,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&dbg, argp, sizeof dbg))
goto out;
r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg);
if (r)
goto out;
r = 0;

427
drivers/kvm/x86.c
View File

@ -1786,6 +1786,433 @@ void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
}
EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
/*
* Check if userspace requested an interrupt window, and that the
* interrupt window is open.
*
* No need to exit to userspace if we already have an interrupt queued.
*/
static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
return (!vcpu->irq_summary &&
kvm_run->request_interrupt_window &&
vcpu->interrupt_window_open &&
(kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
}
static void post_kvm_run_save(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
kvm_run->cr8 = get_cr8(vcpu);
kvm_run->apic_base = kvm_get_apic_base(vcpu);
if (irqchip_in_kernel(vcpu->kvm))
kvm_run->ready_for_interrupt_injection = 1;
else
kvm_run->ready_for_interrupt_injection =
(vcpu->interrupt_window_open &&
vcpu->irq_summary == 0);
}
static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
int r;
if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
pr_debug("vcpu %d received sipi with vector # %x\n",
vcpu->vcpu_id, vcpu->sipi_vector);
kvm_lapic_reset(vcpu);
r = kvm_x86_ops->vcpu_reset(vcpu);
if (r)
return r;
vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
}
preempted:
if (vcpu->guest_debug.enabled)
kvm_x86_ops->guest_debug_pre(vcpu);
again:
r = kvm_mmu_reload(vcpu);
if (unlikely(r))
goto out;
kvm_inject_pending_timer_irqs(vcpu);
preempt_disable();
kvm_x86_ops->prepare_guest_switch(vcpu);
kvm_load_guest_fpu(vcpu);
local_irq_disable();
if (signal_pending(current)) {
local_irq_enable();
preempt_enable();
r = -EINTR;
kvm_run->exit_reason = KVM_EXIT_INTR;
++vcpu->stat.signal_exits;
goto out;
}
if (irqchip_in_kernel(vcpu->kvm))
kvm_x86_ops->inject_pending_irq(vcpu);
else if (!vcpu->mmio_read_completed)
kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
vcpu->guest_mode = 1;
kvm_guest_enter();
if (vcpu->requests)
if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
kvm_x86_ops->tlb_flush(vcpu);
kvm_x86_ops->run(vcpu, kvm_run);
vcpu->guest_mode = 0;
local_irq_enable();
++vcpu->stat.exits;
/*
* We must have an instruction between local_irq_enable() and
* kvm_guest_exit(), so the timer interrupt isn't delayed by
* the interrupt shadow. The stat.exits increment will do nicely.
* But we need to prevent reordering, hence this barrier():
*/
barrier();
kvm_guest_exit();
preempt_enable();
/*
* Profile KVM exit RIPs:
*/
if (unlikely(prof_on == KVM_PROFILING)) {
kvm_x86_ops->cache_regs(vcpu);
profile_hit(KVM_PROFILING, (void *)vcpu->rip);
}
r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
if (r > 0) {
if (dm_request_for_irq_injection(vcpu, kvm_run)) {
r = -EINTR;
kvm_run->exit_reason = KVM_EXIT_INTR;
++vcpu->stat.request_irq_exits;
goto out;
}
if (!need_resched()) {
++vcpu->stat.light_exits;
goto again;
}
}
out:
if (r > 0) {
kvm_resched(vcpu);
goto preempted;
}
post_kvm_run_save(vcpu, kvm_run);
return r;
}
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
int r;
sigset_t sigsaved;
vcpu_load(vcpu);
if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
kvm_vcpu_block(vcpu);
vcpu_put(vcpu);
return -EAGAIN;
}
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
/* re-sync apic's tpr */
if (!irqchip_in_kernel(vcpu->kvm))
set_cr8(vcpu, kvm_run->cr8);
if (vcpu->pio.cur_count) {
r = complete_pio(vcpu);
if (r)
goto out;
}
#if CONFIG_HAS_IOMEM
if (vcpu->mmio_needed) {
memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
vcpu->mmio_read_completed = 1;
vcpu->mmio_needed = 0;
r = emulate_instruction(vcpu, kvm_run,
vcpu->mmio_fault_cr2, 0, 1);
if (r == EMULATE_DO_MMIO) {
/*
* Read-modify-write. Back to userspace.
*/
r = 0;
goto out;
}
}
#endif
if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
kvm_x86_ops->cache_regs(vcpu);
vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
kvm_x86_ops->decache_regs(vcpu);
}
r = __vcpu_run(vcpu, kvm_run);
out:
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
vcpu_put(vcpu);
return r;
}
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
vcpu_load(vcpu);
kvm_x86_ops->cache_regs(vcpu);
regs->rax = vcpu->regs[VCPU_REGS_RAX];
regs->rbx = vcpu->regs[VCPU_REGS_RBX];
regs->rcx = vcpu->regs[VCPU_REGS_RCX];
regs->rdx = vcpu->regs[VCPU_REGS_RDX];
regs->rsi = vcpu->regs[VCPU_REGS_RSI];
regs->rdi = vcpu->regs[VCPU_REGS_RDI];
regs->rsp = vcpu->regs[VCPU_REGS_RSP];
regs->rbp = vcpu->regs[VCPU_REGS_RBP];
#ifdef CONFIG_X86_64
regs->r8 = vcpu->regs[VCPU_REGS_R8];
regs->r9 = vcpu->regs[VCPU_REGS_R9];
regs->r10 = vcpu->regs[VCPU_REGS_R10];
regs->r11 = vcpu->regs[VCPU_REGS_R11];
regs->r12 = vcpu->regs[VCPU_REGS_R12];
regs->r13 = vcpu->regs[VCPU_REGS_R13];
regs->r14 = vcpu->regs[VCPU_REGS_R14];
regs->r15 = vcpu->regs[VCPU_REGS_R15];
#endif
regs->rip = vcpu->rip;
regs->rflags = kvm_x86_ops->get_rflags(vcpu);
/*
* Don't leak debug flags in case they were set for guest debugging
*/
if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
vcpu_put(vcpu);
return 0;
}
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
vcpu_load(vcpu);
vcpu->regs[VCPU_REGS_RAX] = regs->rax;
vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
#ifdef CONFIG_X86_64
vcpu->regs[VCPU_REGS_R8] = regs->r8;
vcpu->regs[VCPU_REGS_R9] = regs->r9;
vcpu->regs[VCPU_REGS_R10] = regs->r10;
vcpu->regs[VCPU_REGS_R11] = regs->r11;
vcpu->regs[VCPU_REGS_R12] = regs->r12;
vcpu->regs[VCPU_REGS_R13] = regs->r13;
vcpu->regs[VCPU_REGS_R14] = regs->r14;
vcpu->regs[VCPU_REGS_R15] = regs->r15;
#endif
vcpu->rip = regs->rip;
kvm_x86_ops->set_rflags(vcpu, regs->rflags);
kvm_x86_ops->decache_regs(vcpu);
vcpu_put(vcpu);
return 0;
}
static void get_segment(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg)
{
return kvm_x86_ops->get_segment(vcpu, var, seg);
}
void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
{
struct kvm_segment cs;
get_segment(vcpu, &cs, VCPU_SREG_CS);
*db = cs.db;
*l = cs.l;
}
EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
struct descriptor_table dt;
int pending_vec;
vcpu_load(vcpu);
get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
kvm_x86_ops->get_idt(vcpu, &dt);
sregs->idt.limit = dt.limit;
sregs->idt.base = dt.base;
kvm_x86_ops->get_gdt(vcpu, &dt);
sregs->gdt.limit = dt.limit;
sregs->gdt.base = dt.base;
kvm_x86_ops->decache_cr4_guest_bits(vcpu);
sregs->cr0 = vcpu->cr0;
sregs->cr2 = vcpu->cr2;
sregs->cr3 = vcpu->cr3;
sregs->cr4 = vcpu->cr4;
sregs->cr8 = get_cr8(vcpu);
sregs->efer = vcpu->shadow_efer;
sregs->apic_base = kvm_get_apic_base(vcpu);
if (irqchip_in_kernel(vcpu->kvm)) {
memset(sregs->interrupt_bitmap, 0,
sizeof sregs->interrupt_bitmap);
pending_vec = kvm_x86_ops->get_irq(vcpu);
if (pending_vec >= 0)
set_bit(pending_vec,
(unsigned long *)sregs->interrupt_bitmap);
} else
memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
sizeof sregs->interrupt_bitmap);
vcpu_put(vcpu);
return 0;
}
static void set_segment(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg)
{
return kvm_x86_ops->set_segment(vcpu, var, seg);
}
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
int mmu_reset_needed = 0;
int i, pending_vec, max_bits;
struct descriptor_table dt;
vcpu_load(vcpu);
dt.limit = sregs->idt.limit;
dt.base = sregs->idt.base;
kvm_x86_ops->set_idt(vcpu, &dt);
dt.limit = sregs->gdt.limit;
dt.base = sregs->gdt.base;
kvm_x86_ops->set_gdt(vcpu, &dt);
vcpu->cr2 = sregs->cr2;
mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
vcpu->cr3 = sregs->cr3;
set_cr8(vcpu, sregs->cr8);
mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
#ifdef CONFIG_X86_64
kvm_x86_ops->set_efer(vcpu, sregs->efer);
#endif
kvm_set_apic_base(vcpu, sregs->apic_base);
kvm_x86_ops->decache_cr4_guest_bits(vcpu);
mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
vcpu->cr0 = sregs->cr0;
kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
if (!is_long_mode(vcpu) && is_pae(vcpu))
load_pdptrs(vcpu, vcpu->cr3);
if (mmu_reset_needed)
kvm_mmu_reset_context(vcpu);
if (!irqchip_in_kernel(vcpu->kvm)) {
memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
sizeof vcpu->irq_pending);
vcpu->irq_summary = 0;
for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
if (vcpu->irq_pending[i])
__set_bit(i, &vcpu->irq_summary);
} else {
max_bits = (sizeof sregs->interrupt_bitmap) << 3;
pending_vec = find_first_bit(
(const unsigned long *)sregs->interrupt_bitmap,
max_bits);
/* Only pending external irq is handled here */
if (pending_vec < max_bits) {
kvm_x86_ops->set_irq(vcpu, pending_vec);
pr_debug("Set back pending irq %d\n",
pending_vec);
}
}
set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
vcpu_put(vcpu);
return 0;
}
int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
struct kvm_debug_guest *dbg)
{
int r;
vcpu_load(vcpu);
r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
vcpu_put(vcpu);
return r;
}
/*
* fxsave fpu state. Taken from x86_64/processor.h. To be killed when
* we have asm/x86/processor.h